<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <p v-if="score>=90">优秀</p>
        <p v-else-if="score>=70">良好</p>
        <p v-else-if="score>=60">及格</p>
        <p v-else>不及格</p>
    </div>
</body>
<script src='../js/vue.js'></script>
<script>
    let app = new Vue({
        el: '#app',
        data: {
             msg:'hello vue.js',
             score: 90
        },
        methods: {}
    })
</script>
</html>